u/Capital_Ad_369

Hello I am building a pc in the Jonsbo D31 mesh but I am confused with the fan placement on the bottom as I will be putting an HDD in on the bottom and do not know how many fans i can put on the bottom in the pictures on the Jonsbo websites there is one with an hdd and it looks that they have 2 140mm fans on the bottom alongside the hdd but i am not so sure so does anyone have experience building in this case and can answer my question? (I do not have the case yet)